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Finding the Fourth Proportional to 2,089.74, 3,134.50 and 856.84

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Solution

The fourth proportional to 2,089.74, 3,134.50 and 856.84 is: 1,285.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,089.74 : 3,134.50 = 856.84 : x
  2. Step 2: Convert to fraction form
    2,089.74/3,134.50 = 856.84/x
  3. Step 3: Cross multiply
    2,089.74x = 3,134.50 × 856.84
  4. Step 4: Simplify right side
    2,089.74x = 2,685,764.98
  5. Step 5: Solve for x
    x = 2,685,764.98/2,089.74
  6. Step 6: Final answer
    x = 1,285.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.